user = ['Jane','Mike','admin','X','Kangkang']
for user in user:
	if user == 'admin':
		print("Hello admin,would you like to see a status report?")
	elif user == 'X':
		print("Welcome X ,would you like to drink?")
	else:
		print("Hello " + user + ",thank you for logging in again.")
users = []
len(users)
print(len(users))
if len(users) == 0:
	print("We need to find some users!")
else:
	print("Hello,our users!")

current_users = ['Jane','Mike','A','B','C']
new_users = ['A','B','D','R','F']
for new_user in new_users:
	if new_user in current_users:
		print("Sorry,please import a new name.")
	else:
		print("It is a new name and you can use it.")

